( function () {
/**
 * THREE.Loader loads FBX file and generates THREE.Group representing FBX scene.
 * Requires FBX file to be >= 7.0 and in ASCII or >= 6400 in Binary format
 * Versions lower than this may load but will probably have errors
 *
 * Needs Support:
 *  Morph normals / blend shape normals
 *
 * FBX format references:
 * 	https://wiki.blender.org/index.php/User:Mont29/Foundation/FBX_File_Structure
 * 	http://help.autodesk.com/view/FBX/2017/ENU/?guid=__cpp_ref_index_html (C++ SDK reference)
 *
 * 	Binary format specification:
 *		https://code.blender.org/2013/08/fbx-binary-file-format-specification/
 */

let fbxTree;
let connections;
let sceneGraph;

class FBXLoader extends THREE.Loader {
  constructor(manager) {
    super(manager);
  }

  load(url, onLoad, onProgress, onError) {
    const scope = this;
    const path = scope.path === '' ? THREE.LoaderUtils.extractUrlBase(url) : scope.path;
    const loader = new THREE.FileLoader(this.manager);
    loader.setPath(scope.path);
    loader.setResponseType('arraybuffer');
    loader.setRequestHeader(scope.requestHeader);
    loader.setWithCredentials(scope.withCredentials);
    loader.load(url, function (buffer) {
      try {
        onLoad(scope.parse(buffer, path));
      } catch (e) {
        if (onError) {
          onError(e);
        } else {
          console.error(e);
        }

        scope.manager.itemError(url);
      }
    }, onProgress, onError);
  }

  parse(FBXBuffer, path) {
    if (isFbxFormatBinary(FBXBuffer)) {
      fbxTree = new BinaryParser().parse(FBXBuffer);
    } else {
      const FBXText = convertArrayBufferToString(FBXBuffer);

      if (!isFbxFormatASCII(FBXText)) {
        throw new Error('THREE.FBXLoader: Unknown format.');
      }

      if (getFbxVersion(FBXText) < 7000) {
        throw new Error('THREE.FBXLoader: FBX version not supported, FileVersion: ' + getFbxVersion(FBXText));
      }

      fbxTree = new TextParser().parse(FBXText);
    } // console.log( fbxTree );


    const textureLoader = new THREE.TextureLoader(this.manager).setPath(this.resourcePath || path).setCrossOrigin(this.crossOrigin);
    return new FBXTreeParser(textureLoader, this.manager).parse(fbxTree);
  }

} // Parse the FBXTree object returned by the BinaryParser or TextParser and return a THREE.Group


class FBXTreeParser {
  constructor(textureLoader, manager) {
    this.textureLoader = textureLoader;
    this.manager = manager;
  }

  parse() {
    connections = this.parseConnections();
    const images = this.parseImages();
    const textures = this.parseTextures(images);
    const materials = this.parseMaterials(textures);
    const deformers = this.parseDeformers();
    const geometryMap = new GeometryParser().parse(deformers);
    this.parseScene(deformers, geometryMap, materials);
    return sceneGraph;
  } // Parses FBXTree.Connections which holds parent-child connections between objects (e.g. material -> texture, model->geometry )
  // and details the connection type


  parseConnections() {
    const connectionMap = new Map();

    if ('Connections' in fbxTree) {
      const rawConnections = fbxTree.Connections.connections;
      rawConnections.forEach(function (rawConnection) {
        const fromID = rawConnection[0];
        const toID = rawConnection[1];
        const relationship = rawConnection[2];

        if (!connectionMap.has(fromID)) {
          connectionMap.set(fromID, {
            parents: [],
            children: []
          });
        }

        const parentRelationship = {
          ID: toID,
          relationship: relationship
        };
        connectionMap.get(fromID).parents.push(parentRelationship);

        if (!connectionMap.has(toID)) {
          connectionMap.set(toID, {
            parents: [],
            children: []
          });
        }

        const childRelationship = {
          ID: fromID,
          relationship: relationship
        };
        connectionMap.get(toID).children.push(childRelationship);
      });
    }

    return connectionMap;
  } // Parse FBXTree.Objects.Video for embedded image data
  // These images are connected to textures in FBXTree.Objects.Textures
  // via FBXTree.Connections.


  parseImages() {
    const images = {};
    const blobs = {};

    if ('Video' in fbxTree.Objects) {
      const videoNodes = fbxTree.Objects.Video;

      for (const nodeID in videoNodes) {
        const videoNode = videoNodes[nodeID];
        const id = parseInt(nodeID);
        images[id] = videoNode.RelativeFilename || videoNode.Filename; // raw image data is in videoNode.Content

        if ('Content' in videoNode) {
          const arrayBufferContent = videoNode.Content instanceof ArrayBuffer && videoNode.Content.byteLength > 0;
          const base64Content = typeof videoNode.Content === 'string' && videoNode.Content !== '';

          if (arrayBufferContent || base64Content) {
            const image = this.parseImage(videoNodes[nodeID]);
            blobs[videoNode.RelativeFilename || videoNode.Filename] = image;
          }
        }
      }
    }

    for (const id in images) {
      const filename = images[id];
      if (blobs[filename] !== undefined) images[id] = blobs[filename];else images[id] = images[id].split('\\').pop();
    }

    return images;
  } // Parse embedded image data in FBXTree.Video.Content


  parseImage(videoNode) {
    const content = videoNode.Content;
    const fileName = videoNode.RelativeFilename || videoNode.Filename;
    const extension = fileName.slice(fileName.lastIndexOf('.') + 1).toLowerCase();
    let type;

    switch (extension) {
      case 'bmp':
        type = 'image/bmp';
        break;

      case 'jpg':
      case 'jpeg':
        type = 'image/jpeg';
        break;

      case 'png':
        type = 'image/png';
        break;

      case 'tif':
        type = 'image/tiff';
        break;

      case 'tga':
        if (this.manager.getHandler('.tga') === null) {
          console.warn('FBXLoader: TGA loader not found, skipping ', fileName);
        }

        type = 'image/tga';
        break;

      default:
        console.warn('FBXLoader: Image type "' + extension + '" is not supported.');
        return;
    }

    if (typeof content === 'string') {
      // ASCII format
      return 'data:' + type + ';base64,' + content;
    } else {
      // Binary Format
      const array = new Uint8Array(content);
      return window.URL.createObjectURL(new Blob([array], {
        type: type
      }));
    }
  } // Parse nodes in FBXTree.Objects.Texture
  // These contain details such as UV scaling, cropping, rotation etc and are connected
  // to images in FBXTree.Objects.Video


  parseTextures(images) {
    const textureMap = new Map();

    if ('Texture' in fbxTree.Objects) {
      const textureNodes = fbxTree.Objects.Texture;

      for (const nodeID in textureNodes) {
        const texture = this.parseTexture(textureNodes[nodeID], images);
        textureMap.set(parseInt(nodeID), texture);
      }
    }

    return textureMap;
  } // Parse individual node in FBXTree.Objects.Texture


  parseTexture(textureNode, images) {
    const texture = this.loadTexture(textureNode, images);
    texture.ID = textureNode.id;
    texture.name = textureNode.attrName;
    const wrapModeU = textureNode.WrapModeU;
    const wrapModeV = textureNode.WrapModeV;
    const valueU = wrapModeU !== undefined ? wrapModeU.value : 0;
    const valueV = wrapModeV !== undefined ? wrapModeV.value : 0; // http://download.autodesk.com/us/fbx/SDKdocs/FBX_SDK_Help/files/fbxsdkref/class_k_fbx_texture.html#889640e63e2e681259ea81061b85143a
    // 0: repeat(default), 1: clamp

    texture.wrapS = valueU === 0 ? THREE.RepeatWrapping : THREE.ClampToEdgeWrapping;
    texture.wrapT = valueV === 0 ? THREE.RepeatWrapping : THREE.ClampToEdgeWrapping;

    if ('Scaling' in textureNode) {
      const values = textureNode.Scaling.value;
      texture.repeat.x = values[0];
      texture.repeat.y = values[1];
    }

    return texture;
  } // load a texture specified as a blob or data URI, or via an external URL using THREE.TextureLoader


  loadTexture(textureNode, images) {
    let fileName;
    const currentPath = this.textureLoader.path;
    const children = connections.get(textureNode.id).children;

    if (children !== undefined && children.length > 0 && images[children[0].ID] !== undefined) {
      fileName = images[children[0].ID];

      if (fileName.indexOf('blob:') === 0 || fileName.indexOf('data:') === 0) {
        this.textureLoader.setPath(undefined);
      }
    }

    let texture;
    const extension = textureNode.FileName.slice(-3).toLowerCase();

    if (extension === 'tga') {
      const loader = this.manager.getHandler('.tga');

      if (loader === null) {
        console.warn('FBXLoader: TGA loader not found, creating placeholder texture for', textureNode.RelativeFilename);
        texture = new THREE.Texture();
      } else {
        loader.setPath(this.textureLoader.path);
        texture = loader.load(fileName);
      }
    } else if (extension === 'psd') {
      console.warn('FBXLoader: PSD textures are not supported, creating placeholder texture for', textureNode.RelativeFilename);
      texture = new THREE.Texture();
    } else {
      texture = this.textureLoader.load(fileName);
    }

    this.textureLoader.setPath(currentPath);
    return texture;
  } // Parse nodes in FBXTree.Objects.Material


  parseMaterials(textureMap) {
    const materialMap = new Map();

    if ('Material' in fbxTree.Objects) {
      const materialNodes = fbxTree.Objects.Material;

      for (const nodeID in materialNodes) {
        const material = this.parseMaterial(materialNodes[nodeID], textureMap);
        if (material !== null) materialMap.set(parseInt(nodeID), material);
      }
    }

    return materialMap;
  } // Parse single node in FBXTree.Objects.Material
  // Materials are connected to texture maps in FBXTree.Objects.Textures
  // FBX format currently only supports Lambert and Phong shading models


  parseMaterial(materialNode, textureMap) {
    const ID = materialNode.id;
    const name = materialNode.attrName;
    let type = materialNode.ShadingModel; // Case where FBX wraps shading model in property object.

    if (typeof type === 'object') {
      type = type.value;
    } // Ignore unused materials which don't have any connections.


    if (!connections.has(ID)) return null;
    const parameters = this.parseParameters(materialNode, textureMap, ID);
    let material;

    switch (type.toLowerCase()) {
      case 'phong':
        material = new THREE.MeshPhongMaterial();
        break;

      case 'lambert':
        material = new THREE.MeshLambertMaterial();
        break;

      default:
        console.warn('THREE.FBXLoader: unknown material type "%s". Defaulting to THREE.MeshPhongMaterial.', type);
        material = new THREE.MeshPhongMaterial();
        break;
    }

    material.setValues(parameters);
    material.name = name;
    return material;
  } // Parse FBX material and return parameters suitable for a three.js material
  // Also parse the texture map and return any textures associated with the material


  parseParameters(materialNode, textureMap, ID) {
    const parameters = {};

    if (materialNode.BumpFactor) {
      parameters.bumpScale = materialNode.BumpFactor.value;
    }

    if (materialNode.Diffuse) {
      parameters.color = new THREE.Color().fromArray(materialNode.Diffuse.value);
    } else if (materialNode.DiffuseColor && (materialNode.DiffuseColor.type === 'Color' || materialNode.DiffuseColor.type === 'ColorRGB')) {
      // The blender exporter exports diffuse here instead of in materialNode.Diffuse
      parameters.color = new THREE.Color().fromArray(materialNode.DiffuseColor.value);
    }

    if (materialNode.DisplacementFactor) {
      parameters.displacementScale = materialNode.DisplacementFactor.value;
    }

    if (materialNode.Emissive) {
      parameters.emissive = new THREE.Color().fromArray(materialNode.Emissive.value);
    } else if (materialNode.EmissiveColor && (materialNode.EmissiveColor.type === 'Color' || materialNode.EmissiveColor.type === 'ColorRGB')) {
      // The blender exporter exports emissive color here instead of in materialNode.Emissive
      parameters.emissive = new THREE.Color().fromArray(materialNode.EmissiveColor.value);
    }

    if (materialNode.EmissiveFactor) {
      parameters.emissiveIntensity = parseFloat(materialNode.EmissiveFactor.value);
    }

    if (materialNode.Opacity) {
      parameters.opacity = parseFloat(materialNode.Opacity.value);
    }

    if (parameters.opacity < 1.0) {
      parameters.transparent = true;
    }

    if (materialNode.ReflectionFactor) {
      parameters.reflectivity = materialNode.ReflectionFactor.value;
    }

    if (materialNode.Shininess) {
      parameters.shininess = materialNode.Shininess.value;
    }

    if (materialNode.Specular) {
      parameters.specular = new THREE.Color().fromArray(materialNode.Specular.value);
    } else if (materialNode.SpecularColor && materialNode.SpecularColor.type === 'Color') {
      // The blender exporter exports specular color here instead of in materialNode.Specular
      parameters.specular = new THREE.Color().fromArray(materialNode.SpecularColor.value);
    }

    const scope = this;
    connections.get(ID).children.forEach(function (child) {
      const type = child.relationship;

      switch (type) {
        case 'Bump':
          parameters.bumpMap = scope.getTexture(textureMap, child.ID);
          break;

        case 'Maya|TEX_ao_map':
          parameters.aoMap = scope.getTexture(textureMap, child.ID);
          break;

        case 'DiffuseColor':
        case 'Maya|TEX_color_map':
          parameters.map = scope.getTexture(textureMap, child.ID);
          parameters.map.encoding = THREE.sRGBEncoding;
          break;

        case 'DisplacementColor':
          parameters.displacementMap = scope.getTexture(textureMap, child.ID);
          break;

        case 'EmissiveColor':
          parameters.emissiveMap = scope.getTexture(textureMap, child.ID);
          parameters.emissiveMap.encoding = THREE.sRGBEncoding;
          break;

        case 'NormalMap':
        case 'Maya|TEX_normal_map':
          parameters.normalMap = scope.getTexture(textureMap, child.ID);
          break;

        case 'ReflectionColor':
          parameters.envMap = scope.getTexture(textureMap, child.ID);
          parameters.envMap.mapping = THREE.EquirectangularReflectionMapping;
          parameters.envMap.encoding = THREE.sRGBEncoding;
          break;

        case 'SpecularColor':
          parameters.specularMap = scope.getTexture(textureMap, child.ID);
          parameters.specularMap.encoding = THREE.sRGBEncoding;
          break;

        case 'TransparentColor':
        case 'TransparencyFactor':
          parameters.alphaMap = scope.getTexture(textureMap, child.ID);
          parameters.transparent = true;
          break;

        case 'AmbientColor':
        case 'ShininessExponent': // AKA glossiness map

        case 'SpecularFactor': // AKA specularLevel

        case 'VectorDisplacementColor': // NOTE: Seems to be a copy of DisplacementColor

        default:
          console.warn('THREE.FBXLoader: %s map is not supported in three.js, skipping texture.', type);
          break;
      }
    });
    return parameters;
  } // get a texture from the textureMap for use by a material.


  getTexture(textureMap, id) {
    // if the texture is a layered texture, just use the first layer and issue a warning
    if ('LayeredTexture' in fbxTree.Objects && id in fbxTree.Objects.LayeredTexture) {
      console.warn('THREE.FBXLoader: layered textures are not supported in three.js. Discarding all but first layer.');
      id = connections.get(id).children[0].ID;
    }

    return textureMap.get(id);
  } // Parse nodes in FBXTree.Objects.Deformer
  // Deformer node can contain skinning or Vertex Cache animation data, however only skinning is supported here
  // Generates map of THREE.Skeleton-like objects for use later when generating and binding skeletons.


  parseDeformers() {
    const skeletons = {};
    const morphTargets = {};

    if ('Deformer' in fbxTree.Objects) {
      const DeformerNodes = fbxTree.Objects.Deformer;

      for (const nodeID in DeformerNodes) {
        const deformerNode = DeformerNodes[nodeID];
        const relationships = connections.get(parseInt(nodeID));

        if (deformerNode.attrType === 'Skin') {
          const skeleton = this.parseSkeleton(relationships, DeformerNodes);
          skeleton.ID = nodeID;
          if (relationships.parents.length > 1) console.warn('THREE.FBXLoader: skeleton attached to more than one geometry is not supported.');
          skeleton.geometryID = relationships.parents[0].ID;
          skeletons[nodeID] = skeleton;
        } else if (deformerNode.attrType === 'BlendShape') {
          const morphTarget = {
            id: nodeID
          };
          morphTarget.rawTargets = this.parseMorphTargets(relationships, DeformerNodes);
          morphTarget.id = nodeID;
          if (relationships.parents.length > 1) console.warn('THREE.FBXLoader: morph target attached to more than one geometry is not supported.');
          morphTargets[nodeID] = morphTarget;
        }
      }
    }

    return {
      skeletons: skeletons,
      morphTargets: morphTargets
    };
  } // Parse single nodes in FBXTree.Objects.Deformer
  // The top level skeleton node has type 'Skin' and sub nodes have type 'Cluster'
  // Each skin node represents a skeleton and each cluster node represents a bone


  parseSkeleton(relationships, deformerNodes) {
    const rawBones = [];
    relationships.children.forEach(function (child) {
      const boneNode = deformerNodes[child.ID];
      if (boneNode.attrType !== 'Cluster') return;
      const rawBone = {
        ID: child.ID,
        indices: [],
        weights: [],
        transformLink: new THREE.Matrix4().fromArray(boneNode.TransformLink.a) // transform: new THREE.Matrix4().fromArray( boneNode.Transform.a ),
        // linkMode: boneNode.Mode,

      };

      if ('Indexes' in boneNode) {
        rawBone.indices = boneNode.Indexes.a;
        rawBone.weights = boneNode.Weights.a;
      }

      rawBones.push(rawBone);
    });
    return {
      rawBones: rawBones,
      bones: []
    };
  } // The top level morph deformer node has type "BlendShape" and sub nodes have type "BlendShapeChannel"


  parseMorphTargets(relationships, deformerNodes) {
    const rawMorphTargets = [];

    for (let i = 0; i < relationships.children.length; i++) {
      const child = relationships.children[i];
      const morphTargetNode = deformerNodes[child.ID];
      const rawMorphTarget = {
        name: morphTargetNode.attrName,
        initialWeight: morphTargetNode.DeformPercent,
        id: morphTargetNode.id,
        fullWeights: morphTargetNode.FullWeights.a
      };
      if (morphTargetNode.attrType !== 'BlendShapeChannel') return;
      rawMorphTarget.geoID = connections.get(parseInt(child.ID)).children.filter(function (child) {
        return child.relationship === undefined;
      })[0].ID;
      rawMorphTargets.push(rawMorphTarget);
    }

    return rawMorphTargets;
  } // create the main THREE.Group() to be returned by the loader


  parseScene(deformers, geometryMap, materialMap) {
    sceneGraph = new THREE.Group();
    const modelMap = this.parseModels(deformers.skeletons, geometryMap, materialMap);
    const modelNodes = fbxTree.Objects.Model;
    const scope = this;
    modelMap.forEach(function (model) {
      const modelNode = modelNodes[model.ID];
      scope.setLookAtProperties(model, modelNode);
      const parentConnections = connections.get(model.ID).parents;
      parentConnections.forEach(function (connection) {
        const parent = modelMap.get(connection.ID);
        if (parent !== undefined) parent.add(model);
      });

      if (model.parent === null) {
        sceneGraph.add(model);
      }
    });
    this.bindSkeleton(deformers.skeletons, geometryMap, modelMap);
    this.createAmbientLight();
    this.setupMorphMaterials();
    sceneGraph.traverse(function (node) {
      if (node.userData.transformData) {
        if (node.parent) {
          node.userData.transformData.parentMatrix = node.parent.matrix;
          node.userData.transformData.parentMatrixWorld = node.parent.matrixWorld;
        }

        const transform = generateTransform(node.userData.transformData);
        node.applyMatrix4(transform);
        node.updateWorldMatrix();
      }
    });
    const animations = new AnimationParser().parse(); // if all the models where already combined in a single group, just return that

    if (sceneGraph.children.length === 1 && sceneGraph.children[0].isGroup) {
      sceneGraph.children[0].animations = animations;
      sceneGraph = sceneGraph.children[0];
    }

    sceneGraph.animations = animations;
  } // parse nodes in FBXTree.Objects.Model


  parseModels(skeletons, geometryMap, materialMap) {
    const modelMap = new Map();
    const modelNodes = fbxTree.Objects.Model;

    for (const nodeID in modelNodes) {
      const id = parseInt(nodeID);
      const node = modelNodes[nodeID];
      const relationships = connections.get(id);
      let model = this.buildSkeleton(relationships, skeletons, id, node.attrName);

      if (!model) {
        switch (node.attrType) {
          case 'Camera':
            model = this.createCamera(relationships);
            break;

          case 'Light':
            model = this.createLight(relationships);
            break;

          case 'Mesh':
            model = this.createMesh(relationships, geometryMap, materialMap);
            break;

          case 'NurbsCurve':
            model = this.createCurve(relationships, geometryMap);
            break;

          case 'LimbNode':
          case 'Root':
            model = new THREE.Bone();
            break;

          case 'Null':
          default:
            model = new THREE.Group();
            break;
        }

        model.name = node.attrName ? THREE.PropertyBinding.sanitizeNodeName(node.attrName) : '';
        model.ID = id;
      }

      this.getTransformData(model, node);
      modelMap.set(id, model);
    }

    return modelMap;
  }

  buildSkeleton(relationships, skeletons, id, name) {
    let bone = null;
    relationships.parents.forEach(function (parent) {
      for (const ID in skeletons) {
        const skeleton = skeletons[ID];
        skeleton.rawBones.forEach(function (rawBone, i) {
          if (rawBone.ID === parent.ID) {
            const subBone = bone;
            bone = new THREE.Bone();
            bone.matrixWorld.copy(rawBone.transformLink); // set name and id here - otherwise in cases where "subBone" is created it will not have a name / id

            bone.name = name ? THREE.PropertyBinding.sanitizeNodeName(name) : '';
            bone.ID = id;
            skeleton.bones[i] = bone; // In cases where a bone is shared between multiple meshes
            // duplicate the bone here and and it as a child of the first bone

            if (subBone !== null) {
              bone.add(subBone);
            }
          }
        });
      }
    });
    return bone;
  } // create a THREE.PerspectiveCamera or THREE.OrthographicCamera


  createCamera(relationships) {
    let model;
    let cameraAttribute;
    relationships.children.forEach(function (child) {
      const attr = fbxTree.Objects.NodeAttribute[child.ID];

      if (attr !== undefined) {
        cameraAttribute = attr;
      }
    });

    if (cameraAttribute === undefined) {
      model = new THREE.Object3D();
    } else {
      let type = 0;

      if (cameraAttribute.CameraProjectionType !== undefined && cameraAttribute.CameraProjectionType.value === 1) {
        type = 1;
      }

      let nearClippingPlane = 1;

      if (cameraAttribute.NearPlane !== undefined) {
        nearClippingPlane = cameraAttribute.NearPlane.value / 1000;
      }

      let farClippingPlane = 1000;

      if (cameraAttribute.FarPlane !== undefined) {
        farClippingPlane = cameraAttribute.FarPlane.value / 1000;
      }

      let width = window.innerWidth;
      let height = window.innerHeight;

      if (cameraAttribute.AspectWidth !== undefined && cameraAttribute.AspectHeight !== undefined) {
        width = cameraAttribute.AspectWidth.value;
        height = cameraAttribute.AspectHeight.value;
      }

      const aspect = width / height;
      let fov = 45;

      if (cameraAttribute.FieldOfView !== undefined) {
        fov = cameraAttribute.FieldOfView.value;
      }

      const focalLength = cameraAttribute.FocalLength ? cameraAttribute.FocalLength.value : null;

      switch (type) {
        case 0:
          // Perspective
          model = new THREE.PerspectiveCamera(fov, aspect, nearClippingPlane, farClippingPlane);
          if (focalLength !== null) model.setFocalLength(focalLength);
          break;

        case 1:
          // Orthographic
          model = new THREE.OrthographicCamera(-width / 2, width / 2, height / 2, -height / 2, nearClippingPlane, farClippingPlane);
          break;

        default:
          console.warn('THREE.FBXLoader: Unknown camera type ' + type + '.');
          model = new THREE.Object3D();
          break;
      }
    }

    return model;
  } // Create a THREE.DirectionalLight, THREE.PointLight or THREE.SpotLight


  createLight(relationships) {
    let model;
    let lightAttribute;
    relationships.children.forEach(function (child) {
      const attr = fbxTree.Objects.NodeAttribute[child.ID];

      if (attr !== undefined) {
        lightAttribute = attr;
      }
    });

    if (lightAttribute === undefined) {
      model = new THREE.Object3D();
    } else {
      let type; // LightType can be undefined for Point lights

      if (lightAttribute.LightType === undefined) {
        type = 0;
      } else {
        type = lightAttribute.LightType.value;
      }

      let color = 0xffffff;

      if (lightAttribute.Color !== undefined) {
        color = new THREE.Color().fromArray(lightAttribute.Color.value);
      }

      let intensity = lightAttribute.Intensity === undefined ? 1 : lightAttribute.Intensity.value / 100; // light disabled

      if (lightAttribute.CastLightOnObject !== undefined && lightAttribute.CastLightOnObject.value === 0) {
        intensity = 0;
      }

      let distance = 0;

      if (lightAttribute.FarAttenuationEnd !== undefined) {
        if (lightAttribute.EnableFarAttenuation !== undefined && lightAttribute.EnableFarAttenuation.value === 0) {
          distance = 0;
        } else {
          distance = lightAttribute.FarAttenuationEnd.value;
        }
      } // TODO: could this be calculated linearly from FarAttenuationStart to FarAttenuationEnd?


      const decay = 1;

      switch (type) {
        case 0:
          // Point
          model = new THREE.PointLight(color, intensity, distance, decay);
          break;

        case 1:
          // Directional
          model = new THREE.DirectionalLight(color, intensity);
          break;

        case 2:
          // Spot
          let angle = Math.PI / 3;

          if (lightAttribute.InnerAngle !== undefined) {
            angle = THREE.MathUtils.degToRad(lightAttribute.InnerAngle.value);
          }

          let penumbra = 0;

          if (lightAttribute.OuterAngle !== undefined) {
            // TODO: this is not correct - FBX calculates outer and inner angle in degrees
            // with OuterAngle > InnerAngle && OuterAngle <= Math.PI
            // while three.js uses a penumbra between (0, 1) to attenuate the inner angle
            penumbra = THREE.MathUtils.degToRad(lightAttribute.OuterAngle.value);
            penumbra = Math.max(penumbra, 1);
          }

          model = new THREE.SpotLight(color, intensity, distance, angle, penumbra, decay);
          break;

        default:
          console.warn('THREE.FBXLoader: Unknown light type ' + lightAttribute.LightType.value + ', defaulting to a THREE.PointLight.');
          model = new THREE.PointLight(color, intensity);
          break;
      }

      if (lightAttribute.CastShadows !== undefined && lightAttribute.CastShadows.value === 1) {
        model.castShadow = true;
      }
    }

    return model;
  }

  createMesh(relationships, geometryMap, materialMap) {
    let model;
    let geometry = null;
    let material = null;
    const materials = []; // get geometry and materials(s) from connections

    relationships.children.forEach(function (child) {
      if (geometryMap.has(child.ID)) {
        geometry = geometryMap.get(child.ID);
      }

      if (materialMap.has(child.ID)) {
        materials.push(materialMap.get(child.ID));
      }
    });

    if (materials.length > 1) {
      material = materials;
    } else if (materials.length > 0) {
      material = materials[0];
    } else {
      material = new THREE.MeshPhongMaterial({
        color: 0xcccccc
      });
      materials.push(material);
    }

    if ('color' in geometry.attributes) {
      materials.forEach(function (material) {
        material.vertexColors = true;
      });
    }

    if (geometry.FBX_Deformer) {
      model = new THREE.SkinnedMesh(geometry, material);
      model.normalizeSkinWeights();
    } else {
      model = new THREE.Mesh(geometry, material);
    }

    return model;
  }

  createCurve(relationships, geometryMap) {
    const geometry = relationships.children.reduce(function (geo, child) {
      if (geometryMap.has(child.ID)) geo = geometryMap.get(child.ID);
      return geo;
    }, null); // FBX does not list materials for Nurbs lines, so we'll just put our own in here.

    const material = new THREE.LineBasicMaterial({
      color: 0x3300ff,
      linewidth: 1
    });
    return new THREE.Line(geometry, material);
  } // parse the model node for transform data


  getTransformData(model, modelNode) {
    const transformData = {};
    if ('InheritType' in modelNode) transformData.inheritType = parseInt(modelNode.InheritType.value);
    if ('RotationOrder' in modelNode) transformData.eulerOrder = getEulerOrder(modelNode.RotationOrder.value);else transformData.eulerOrder = 'ZYX';
    if ('Lcl_Translation' in modelNode) transformData.translation = modelNode.Lcl_Translation.value;
    if ('PreRotation' in modelNode) transformData.preRotation = modelNode.PreRotation.value;
    if ('Lcl_Rotation' in modelNode) transformData.rotation = modelNode.Lcl_Rotation.value;
    if ('PostRotation' in modelNode) transformData.postRotation = modelNode.PostRotation.value;
    if ('Lcl_Scaling' in modelNode) transformData.scale = modelNode.Lcl_Scaling.value;
    if ('ScalingOffset' in modelNode) transformData.scalingOffset = modelNode.ScalingOffset.value;
    if ('ScalingPivot' in modelNode) transformData.scalingPivot = modelNode.ScalingPivot.value;
    if ('RotationOffset' in modelNode) transformData.rotationOffset = modelNode.RotationOffset.value;
    if ('RotationPivot' in modelNode) transformData.rotationPivot = modelNode.RotationPivot.value;
    model.userData.transformData = transformData;
  }

  setLookAtProperties(model, modelNode) {
    if ('LookAtProperty' in modelNode) {
      const children = connections.get(model.ID).children;
      children.forEach(function (child) {
        if (child.relationship === 'LookAtProperty') {
          const lookAtTarget = fbxTree.Objects.Model[child.ID];

          if ('Lcl_Translation' in lookAtTarget) {
            const pos = lookAtTarget.Lcl_Translation.value; // THREE.DirectionalLight, THREE.SpotLight

            if (model.target !== undefined) {
              model.target.position.fromArray(pos);
              sceneGraph.add(model.target);
            } else {
              // Cameras and other Object3Ds
              model.lookAt(new THREE.Vector3().fromArray(pos));
            }
          }
        }
      });
    }
  }

  bindSkeleton(skeletons, geometryMap, modelMap) {
    const bindMatrices = this.parsePoseNodes();

    for (const ID in skeletons) {
      const skeleton = skeletons[ID];
      const parents = connections.get(parseInt(skeleton.ID)).parents;
      parents.forEach(function (parent) {
        if (geometryMap.has(parent.ID)) {
          const geoID = parent.ID;
          const geoRelationships = connections.get(geoID);
          geoRelationships.parents.forEach(function (geoConnParent) {
            if (modelMap.has(geoConnParent.ID)) {
              const model = modelMap.get(geoConnParent.ID);
              model.bind(new THREE.Skeleton(skeleton.bones), bindMatrices[geoConnParent.ID]);
            }
          });
        }
      });
    }
  }

  parsePoseNodes() {
    const bindMatrices = {};

    if ('Pose' in fbxTree.Objects) {
      const BindPoseNode = fbxTree.Objects.Pose;

      for (const nodeID in BindPoseNode) {
        if (BindPoseNode[nodeID].attrType === 'BindPose') {
          const poseNodes = BindPoseNode[nodeID].PoseNode;

          if (Array.isArray(poseNodes)) {
            poseNodes.forEach(function (poseNode) {
              bindMatrices[poseNode.Node] = new THREE.Matrix4().fromArray(poseNode.Matrix.a);
            });
          } else {
            bindMatrices[poseNodes.Node] = new THREE.Matrix4().fromArray(poseNodes.Matrix.a);
          }
        }
      }
    }

    return bindMatrices;
  } // Parse ambient color in FBXTree.GlobalSettings - if it's not set to black (default), create an ambient light


  createAmbientLight() {
    if ('GlobalSettings' in fbxTree && 'AmbientColor' in fbxTree.GlobalSettings) {
      const ambientColor = fbxTree.GlobalSettings.AmbientColor.value;
      const r = ambientColor[0];
      const g = ambientColor[1];
      const b = ambientColor[2];

      if (r !== 0 || g !== 0 || b !== 0) {
        const color = new THREE.Color(r, g, b);
        sceneGraph.add(new THREE.AmbientLight(color, 1));
      }
    }
  }

  setupMorphMaterials() {
    const scope = this;
    sceneGraph.traverse(function (child) {
      if (child.isMesh) {
        if (child.geometry.morphAttributes.position && child.geometry.morphAttributes.position.length) {
          if (Array.isArray(child.material)) {
            child.material.forEach(function (material, i) {
              scope.setupMorphMaterial(child, material, i);
            });
          } else {
            scope.setupMorphMaterial(child, child.material);
          }
        }
      }
    });
  }

  setupMorphMaterial(child, material, index) {
    const uuid = child.uuid;
    const matUuid = material.uuid; // if a geometry has morph targets, it cannot share the material with other geometries

    let sharedMat = false;
    sceneGraph.traverse(function (node) {
      if (node.isMesh) {
        if (Array.isArray(node.material)) {
          node.material.forEach(function (mat) {
            if (mat.uuid === matUuid && node.uuid !== uuid) sharedMat = true;
          });
        } else if (node.material.uuid === matUuid && node.uuid !== uuid) sharedMat = true;
      }
    });

    if (sharedMat === true) {
      const clonedMat = material.clone();
      clonedMat.morphTargets = true;
      if (index === undefined) child.material = clonedMat;else child.material[index] = clonedMat;
    } else material.morphTargets = true;
  }

} // parse Geometry data from FBXTree and return map of BufferGeometries


class GeometryParser {
  // Parse nodes in FBXTree.Objects.Geometry
  parse(deformers) {
    const geometryMap = new Map();

    if ('Geometry' in fbxTree.Objects) {
      const geoNodes = fbxTree.Objects.Geometry;

      for (const nodeID in geoNodes) {
        const relationships = connections.get(parseInt(nodeID));
        const geo = this.parseGeometry(relationships, geoNodes[nodeID], deformers);
        geometryMap.set(parseInt(nodeID), geo);
      }
    }

    return geometryMap;
  } // Parse single node in FBXTree.Objects.Geometry


  parseGeometry(relationships, geoNode, deformers) {
    switch (geoNode.attrType) {
      case 'Mesh':
        return this.parseMeshGeometry(relationships, geoNode, deformers);
        break;

      case 'NurbsCurve':
        return this.parseNurbsGeometry(geoNode);
        break;
    }
  } // Parse single node mesh geometry in FBXTree.Objects.Geometry


  parseMeshGeometry(relationships, geoNode, deformers) {
    const skeletons = deformers.skeletons;
    const morphTargets = [];
    const modelNodes = relationships.parents.map(function (parent) {
      return fbxTree.Objects.Model[parent.ID];
    }); // don't create geometry if it is not associated with any models

    if (modelNodes.length === 0) return;
    const skeleton = relationships.children.reduce(function (skeleton, child) {
      if (skeletons[child.ID] !== undefined) skeleton = skeletons[child.ID];
      return skeleton;
    }, null);
    relationships.children.forEach(function (child) {
      if (deformers.morphTargets[child.ID] !== undefined) {
        morphTargets.push(deformers.morphTargets[child.ID]);
      }
    }); // Assume one model and get the preRotation from that
    // if there is more than one model associated with the geometry this may cause problems

    const modelNode = modelNodes[0];
    const transformData = {};
    if ('RotationOrder' in modelNode) transformData.eulerOrder = getEulerOrder(modelNode.RotationOrder.value);
    if ('InheritType' in modelNode) transformData.inheritType = parseInt(modelNode.InheritType.value);
    if ('GeometricTranslation' in modelNode) transformData.translation = modelNode.GeometricTranslation.value;
    if ('GeometricRotation' in modelNode) transformData.rotation = modelNode.GeometricRotation.value;
    if ('GeometricScaling' in modelNode) transformData.scale = modelNode.GeometricScaling.value;
    const transform = generateTransform(transformData);
    return this.genGeometry(geoNode, skeleton, morphTargets, transform);
  } // Generate a THREE.BufferGeometry from a node in FBXTree.Objects.Geometry


  genGeometry(geoNode, skeleton, morphTargets, preTransform) {
    const geo = new THREE.BufferGeometry();
    if (geoNode.attrName) geo.name = geoNode.attrName;
    const geoInfo = this.parseGeoNode(geoNode, skeleton);
    const buffers = this.genBuffers(geoInfo);
    const positionAttribute = new THREE.Float32BufferAttribute(buffers.vertex, 3);
    positionAttribute.applyMatrix4(preTransform);
    geo.setAttribute('position', positionAttribute);

    if (buffers.colors.length > 0) {
      geo.setAttribute('color', new THREE.Float32BufferAttribute(buffers.colors, 3));
    }

    if (skeleton) {
      geo.setAttribute('skinIndex', new THREE.Uint16BufferAttribute(buffers.weightsIndices, 4));
      geo.setAttribute('skinWeight', new THREE.Float32BufferAttribute(buffers.vertexWeights, 4)); // used later to bind the skeleton to the model

      geo.FBX_Deformer = skeleton;
    }

    if (buffers.normal.length > 0) {
      const normalMatrix = new THREE.Matrix3().getNormalMatrix(preTransform);
      const normalAttribute = new THREE.Float32BufferAttribute(buffers.normal, 3);
      normalAttribute.applyNormalMatrix(normalMatrix);
      geo.setAttribute('normal', normalAttribute);
    }

    buffers.uvs.forEach(function (uvBuffer, i) {
      // subsequent uv buffers are called 'uv1', 'uv2', ...
      let name = 'uv' + (i + 1).toString(); // the first uv buffer is just called 'uv'

      if (i === 0) {
        name = 'uv';
      }

      geo.setAttribute(name, new THREE.Float32BufferAttribute(buffers.uvs[i], 2));
    });

    if (geoInfo.material && geoInfo.material.mappingType !== 'AllSame') {
      // Convert the material indices of each vertex into rendering groups on the geometry.
      let prevMaterialIndex = buffers.materialIndex[0];
      let startIndex = 0;
      buffers.materialIndex.forEach(function (currentIndex, i) {
        if (currentIndex !== prevMaterialIndex) {
          geo.addGroup(startIndex, i - startIndex, prevMaterialIndex);
          prevMaterialIndex = currentIndex;
          startIndex = i;
        }
      }); // the loop above doesn't add the last group, do that here.

      if (geo.groups.length > 0) {
        const lastGroup = geo.groups[geo.groups.length - 1];
        const lastIndex = lastGroup.start + lastGroup.count;

        if (lastIndex !== buffers.materialIndex.length) {
          geo.addGroup(lastIndex, buffers.materialIndex.length - lastIndex, prevMaterialIndex);
        }
      } // case where there are multiple materials but the whole geometry is only
      // using one of them


      if (geo.groups.length === 0) {
        geo.addGroup(0, buffers.materialIndex.length, buffers.materialIndex[0]);
      }
    }

    this.addMorphTargets(geo, geoNode, morphTargets, preTransform);
    return geo;
  }

  parseGeoNode(geoNode, skeleton) {
    const geoInfo = {};
    geoInfo.vertexPositions = geoNode.Vertices !== undefined ? geoNode.Vertices.a : [];
    geoInfo.vertexIndices = geoNode.PolygonVertexIndex !== undefined ? geoNode.PolygonVertexIndex.a : [];

    if (geoNode.LayerElementColor) {
      geoInfo.color = this.parseVertexColors(geoNode.LayerElementColor[0]);
    }

    if (geoNode.LayerElementMaterial) {
      geoInfo.material = this.parseMaterialIndices(geoNode.LayerElementMaterial[0]);
    }

    if (geoNode.LayerElementNormal) {
      geoInfo.normal = this.parseNormals(geoNode.LayerElementNormal[0]);
    }

    if (geoNode.LayerElementUV) {
      geoInfo.uv = [];
      let i = 0;

      while (geoNode.LayerElementUV[i]) {
        if (geoNode.LayerElementUV[i].UV) {
          geoInfo.uv.push(this.parseUVs(geoNode.LayerElementUV[i]));
        }

        i++;
      }
    }

    geoInfo.weightTable = {};

    if (skeleton !== null) {
      geoInfo.skeleton = skeleton;
      skeleton.rawBones.forEach(function (rawBone, i) {
        // loop over the bone's vertex indices and weights
        rawBone.indices.forEach(function (index, j) {
          if (geoInfo.weightTable[index] === undefined) geoInfo.weightTable[index] = [];
          geoInfo.weightTable[index].push({
            id: i,
            weight: rawBone.weights[j]
          });
        });
      });
    }

    return geoInfo;
  }

  genBuffers(geoInfo) {
    const buffers = {
      vertex: [],
      normal: [],
      colors: [],
      uvs: [],
      materialIndex: [],
      vertexWeights: [],
      weightsIndices: []
    };
    let polygonIndex = 0;
    let faceLength = 0;
    let displayedWeightsWarning = false; // these will hold data for a single face

    let facePositionIndexes = [];
    let faceNormals = [];
    let faceColors = [];
    let faceUVs = [];
    let faceWeights = [];
    let faceWeightIndices = [];
    const scope = this;
    geoInfo.vertexIndices.forEach(function (vertexIndex, polygonVertexIndex) {
      let materialIndex;
      let endOfFace = false; // Face index and vertex index arrays are combined in a single array
      // A cube with quad faces looks like this:
      // PolygonVertexIndex: *24 {
      //  a: 0, 1, 3, -3, 2, 3, 5, -5, 4, 5, 7, -7, 6, 7, 1, -1, 1, 7, 5, -4, 6, 0, 2, -5
      //  }
      // Negative numbers mark the end of a face - first face here is 0, 1, 3, -3
      // to find index of last vertex bit shift the index: ^ - 1

      if (vertexIndex < 0) {
        vertexIndex = vertexIndex ^ -1; // equivalent to ( x * -1 ) - 1

        endOfFace = true;
      }

      let weightIndices = [];
      let weights = [];
      facePositionIndexes.push(vertexIndex * 3, vertexIndex * 3 + 1, vertexIndex * 3 + 2);

      if (geoInfo.color) {
        const data = getData(polygonVertexIndex, polygonIndex, vertexIndex, geoInfo.color);
        faceColors.push(data[0], data[1], data[2]);
      }

      if (geoInfo.skeleton) {
        if (geoInfo.weightTable[vertexIndex] !== undefined) {
          geoInfo.weightTable[vertexIndex].forEach(function (wt) {
            weights.push(wt.weight);
            weightIndices.push(wt.id);
          });
        }

        if (weights.length > 4) {
          if (!displayedWeightsWarning) {
            console.warn('THREE.FBXLoader: Vertex has more than 4 skinning weights assigned to vertex. Deleting additional weights.');
            displayedWeightsWarning = true;
          }

          const wIndex = [0, 0, 0, 0];
          const Weight = [0, 0, 0, 0];
          weights.forEach(function (weight, weightIndex) {
            let currentWeight = weight;
            let currentIndex = weightIndices[weightIndex];
            Weight.forEach(function (comparedWeight, comparedWeightIndex, comparedWeightArray) {
              if (currentWeight > comparedWeight) {
                comparedWeightArray[comparedWeightIndex] = currentWeight;
                currentWeight = comparedWeight;
                const tmp = wIndex[comparedWeightIndex];
                wIndex[comparedWeightIndex] = currentIndex;
                currentIndex = tmp;
              }
            });
          });
          weightIndices = wIndex;
          weights = Weight;
        } // if the weight array is shorter than 4 pad with 0s


        while (weights.length < 4) {
          weights.push(0);
          weightIndices.push(0);
        }

        for (let i = 0; i < 4; ++i) {
          faceWeights.push(weights[i]);
          faceWeightIndices.push(weightIndices[i]);
        }
      }

      if (geoInfo.normal) {
        const data = getData(polygonVertexIndex, polygonIndex, vertexIndex, geoInfo.normal);
        faceNormals.push(data[0], data[1], data[2]);
      }

      if (geoInfo.material && geoInfo.material.mappingType !== 'AllSame') {
        materialIndex = getData(polygonVertexIndex, polygonIndex, vertexIndex, geoInfo.material)[0];
      }

      if (geoInfo.uv) {
        geoInfo.uv.forEach(function (uv, i) {
          const data = getData(polygonVertexIndex, polygonIndex, vertexIndex, uv);

          if (faceUVs[i] === undefined) {
            faceUVs[i] = [];
          }

          faceUVs[i].push(data[0]);
          faceUVs[i].push(data[1]);
        });
      }

      faceLength++;

      if (endOfFace) {
        scope.genFace(buffers, geoInfo, facePositionIndexes, materialIndex, faceNormals, faceColors, faceUVs, faceWeights, faceWeightIndices, faceLength);
        polygonIndex++;
        faceLength = 0; // reset arrays for the next face

        facePositionIndexes = [];
        faceNormals = [];
        faceColors = [];
        faceUVs = [];
        faceWeights = [];
        faceWeightIndices = [];
      }
    });
    return buffers;
  } // Generate data for a single face in a geometry. If the face is a quad then split it into 2 tris


  genFace(buffers, geoInfo, facePositionIndexes, materialIndex, faceNormals, faceColors, faceUVs, faceWeights, faceWeightIndices, faceLength) {
    for (let i = 2; i < faceLength; i++) {
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[0]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[1]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[2]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[(i - 1) * 3]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[(i - 1) * 3 + 1]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[(i - 1) * 3 + 2]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i * 3]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i * 3 + 1]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i * 3 + 2]]);

      if (geoInfo.skeleton) {
        buffers.vertexWeights.push(faceWeights[0]);
        buffers.vertexWeights.push(faceWeights[1]);
        buffers.vertexWeights.push(faceWeights[2]);
        buffers.vertexWeights.push(faceWeights[3]);
        buffers.vertexWeights.push(faceWeights[(i - 1) * 4]);
        buffers.vertexWeights.push(faceWeights[(i - 1) * 4 + 1]);
        buffers.vertexWeights.push(faceWeights[(i - 1) * 4 + 2]);
        buffers.vertexWeights.push(faceWeights[(i - 1) * 4 + 3]);
        buffers.vertexWeights.push(faceWeights[i * 4]);
        buffers.vertexWeights.push(faceWeights[i * 4 + 1]);
        buffers.vertexWeights.push(faceWeights[i * 4 + 2]);
        buffers.vertexWeights.push(faceWeights[i * 4 + 3]);
        buffers.weightsIndices.push(faceWeightIndices[0]);
        buffers.weightsIndices.push(faceWeightIndices[1]);
        buffers.weightsIndices.push(faceWeightIndices[2]);
        buffers.weightsIndices.push(faceWeightIndices[3]);
        buffers.weightsIndices.push(faceWeightIndices[(i - 1) * 4]);
        buffers.weightsIndices.push(faceWeightIndices[(i - 1) * 4 + 1]);
        buffers.weightsIndices.push(faceWeightIndices[(i - 1) * 4 + 2]);
        buffers.weightsIndices.push(faceWeightIndices[(i - 1) * 4 + 3]);
        buffers.weightsIndices.push(faceWeightIndices[i * 4]);
        buffers.weightsIndices.push(faceWeightIndices[i * 4 + 1]);
        buffers.weightsIndices.push(faceWeightIndices[i * 4 + 2]);
        buffers.weightsIndices.push(faceWeightIndices[i * 4 + 3]);
      }

      if (geoInfo.color) {
        buffers.colors.push(faceColors[0]);
        buffers.colors.push(faceColors[1]);
        buffers.colors.push(faceColors[2]);
        buffers.colors.push(faceColors[(i - 1) * 3]);
        buffers.colors.push(faceColors[(i - 1) * 3 + 1]);
        buffers.colors.push(faceColors[(i - 1) * 3 + 2]);
        buffers.colors.push(faceColors[i * 3]);
        buffers.colors.push(faceColors[i * 3 + 1]);
        buffers.colors.push(faceColors[i * 3 + 2]);
      }

      if (geoInfo.material && geoInfo.material.mappingType !== 'AllSame') {
        buffers.materialIndex.push(materialIndex);
        buffers.materialIndex.push(materialIndex);
        buffers.materialIndex.push(materialIndex);
      }

      if (geoInfo.normal) {
        buffers.normal.push(faceNormals[0]);
        buffers.normal.push(faceNormals[1]);
        buffers.normal.push(faceNormals[2]);
        buffers.normal.push(faceNormals[(i - 1) * 3]);
        buffers.normal.push(faceNormals[(i - 1) * 3 + 1]);
        buffers.normal.push(faceNormals[(i - 1) * 3 + 2]);
        buffers.normal.push(faceNormals[i * 3]);
        buffers.normal.push(faceNormals[i * 3 + 1]);
        buffers.normal.push(faceNormals[i * 3 + 2]);
      }

      if (geoInfo.uv) {
        geoInfo.uv.forEach(function (uv, j) {
          if (buffers.uvs[j] === undefined) buffers.uvs[j] = [];
          buffers.uvs[j].push(faceUVs[j][0]);
          buffers.uvs[j].push(faceUVs[j][1]);
          buffers.uvs[j].push(faceUVs[j][(i - 1) * 2]);
          buffers.uvs[j].push(faceUVs[j][(i - 1) * 2 + 1]);
          buffers.uvs[j].push(faceUVs[j][i * 2]);
          buffers.uvs[j].push(faceUVs[j][i * 2 + 1]);
        });
      }
    }
  }

  addMorphTargets(parentGeo, parentGeoNode, morphTargets, preTransform) {
    if (morphTargets.length === 0) return;
    parentGeo.morphTargetsRelative = true;
    parentGeo.morphAttributes.position = []; // parentGeo.morphAttributes.normal = []; // not implemented

    const scope = this;
    morphTargets.forEach(function (morphTarget) {
      morphTarget.rawTargets.forEach(function (rawTarget) {
        const morphGeoNode = fbxTree.Objects.Geometry[rawTarget.geoID];

        if (morphGeoNode !== undefined) {
          scope.genMorphGeometry(parentGeo, parentGeoNode, morphGeoNode, preTransform, rawTarget.name);
        }
      });
    });
  } // a morph geometry node is similar to a standard  node, and the node is also contained
  // in FBXTree.Objects.Geometry, however it can only have attributes for position, normal
  // and a special attribute Index defining which vertices of the original geometry are affected
  // Normal and position attributes only have data for the vertices that are affected by the morph


  genMorphGeometry(parentGeo, parentGeoNode, morphGeoNode, preTransform, name) {
    const vertexIndices = parentGeoNode.PolygonVertexIndex !== undefined ? parentGeoNode.PolygonVertexIndex.a : [];
    const morphPositionsSparse = morphGeoNode.Vertices !== undefined ? morphGeoNode.Vertices.a : [];
    const indices = morphGeoNode.Indexes !== undefined ? morphGeoNode.Indexes.a : [];
    const length = parentGeo.attributes.position.count * 3;
    const morphPositions = new Float32Array(length);

    for (let i = 0; i < indices.length; i++) {
      const morphIndex = indices[i] * 3;
      morphPositions[morphIndex] = morphPositionsSparse[i * 3];
      morphPositions[morphIndex + 1] = morphPositionsSparse[i * 3 + 1];
      morphPositions[morphIndex + 2] = morphPositionsSparse[i * 3 + 2];
    } // TODO: add morph normal support


    const morphGeoInfo = {
      vertexIndices: vertexIndices,
      vertexPositions: morphPositions
    };
    const morphBuffers = this.genBuffers(morphGeoInfo);
    const positionAttribute = new THREE.Float32BufferAttribute(morphBuffers.vertex, 3);
    positionAttribute.name = name || morphGeoNode.attrName;
    positionAttribute.applyMatrix4(preTransform);
    parentGeo.morphAttributes.position.push(positionAttribute);
  } // Parse normal from FBXTree.Objects.Geometry.LayerElementNormal if it exists


  parseNormals(NormalNode) {
    const mappingType = NormalNode.MappingInformationType;
    const referenceType = NormalNode.ReferenceInformationType;
    const buffer = NormalNode.Normals.a;
    let indexBuffer = [];

    if (referenceType === 'IndexToDirect') {
      if ('NormalIndex' in NormalNode) {
        indexBuffer = NormalNode.NormalIndex.a;
      } else if ('NormalsIndex' in NormalNode) {
        indexBuffer = NormalNode.NormalsIndex.a;
      }
    }

    return {
      dataSize: 3,
      buffer: buffer,
      indices: indexBuffer,
      mappingType: mappingType,
      referenceType: referenceType
    };
  } // Parse UVs from FBXTree.Objects.Geometry.LayerElementUV if it exists


  parseUVs(UVNode) {
    const mappingType = UVNode.MappingInformationType;
    const referenceType = UVNode.ReferenceInformationType;
    const buffer = UVNode.UV.a;
    let indexBuffer = [];

    if (referenceType === 'IndexToDirect') {
      indexBuffer = UVNode.UVIndex.a;
    }

    return {
      dataSize: 2,
      buffer: buffer,
      indices: indexBuffer,
      mappingType: mappingType,
      referenceType: referenceType
    };
  } // Parse Vertex Colors from FBXTree.Objects.Geometry.LayerElementColor if it exists


  parseVertexColors(ColorNode) {
    const mappingType = ColorNode.MappingInformationType;
    const referenceType = ColorNode.ReferenceInformationType;
    const buffer = ColorNode.Colors.a;
    let indexBuffer = [];

    if (referenceType === 'IndexToDirect') {
      indexBuffer = ColorNode.ColorIndex.a;
    }

    return {
      dataSize: 4,
      buffer: buffer,
      indices: indexBuffer,
      mappingType: mappingType,
      referenceType: referenceType
    };
  } // Parse mapping and material data in FBXTree.Objects.Geometry.LayerElementMaterial if it exists


  parseMaterialIndices(MaterialNode) {
    const mappingType = MaterialNode.MappingInformationType;
    const referenceType = MaterialNode.ReferenceInformationType;

    if (mappingType === 'NoMappingInformation') {
      return {
        dataSize: 1,
        buffer: [0],
        indices: [0],
        mappingType: 'AllSame',
        referenceType: referenceType
      };
    }

    const materialIndexBuffer = MaterialNode.Materials.a; // Since materials are stored as indices, there's a bit of a mismatch between FBX and what
    // we expect.So we create an intermediate buffer that points to the index in the buffer,
    // for conforming with the other functions we've written for other data.

    const materialIndices = [];

    for (let i = 0; i < materialIndexBuffer.length; ++i) {
      materialIndices.push(i);
    }

    return {
      dataSize: 1,
      buffer: materialIndexBuffer,
      indices: materialIndices,
      mappingType: mappingType,
      referenceType: referenceType
    };
  } // Generate a NurbGeometry from a node in FBXTree.Objects.Geometry


  parseNurbsGeometry(geoNode) {
    if (THREE.NURBSCurve === undefined) {
      console.error('THREE.FBXLoader: The loader relies on THREE.NURBSCurve for any nurbs present in the model. Nurbs will show up as empty geometry.');
      return new THREE.BufferGeometry();
    }

    const order = parseInt(geoNode.Order);

    if (isNaN(order)) {
      console.error('THREE.FBXLoader: Invalid Order %s given for geometry ID: %s', geoNode.Order, geoNode.id);
      return new THREE.BufferGeometry();
    }

    const degree = order - 1;
    const knots = geoNode.KnotVector.a;
    const controlPoints = [];
    const pointsValues = geoNode.Points.a;

    for (let i = 0, l = pointsValues.length; i < l; i += 4) {
      controlPoints.push(new THREE.Vector4().fromArray(pointsValues, i));
    }

    let startKnot, endKnot;

    if (geoNode.Form === 'Closed') {
      controlPoints.push(controlPoints[0]);
    } else if (geoNode.Form === 'Periodic') {
      startKnot = degree;
      endKnot = knots.length - 1 - startKnot;

      for (let i = 0; i < degree; ++i) {
        controlPoints.push(controlPoints[i]);
      }
    }

    const curve = new THREE.NURBSCurve(degree, knots, controlPoints, startKnot, endKnot);
    const vertices = curve.getPoints(controlPoints.length * 7);
    const positions = new Float32Array(vertices.length * 3);
    vertices.forEach(function (vertex, i) {
      vertex.toArray(positions, i * 3);
    });
    const geometry = new THREE.BufferGeometry();
    geometry.setAttribute('position', new THREE.BufferAttribute(positions, 3));
    return geometry;
  }

} // parse animation data from FBXTree


class AnimationParser {
  // take raw animation clips and turn them into three.js animation clips
  parse() {
    const animationClips = [];
    const rawClips = this.parseClips();

    if (rawClips !== undefined) {
      for (const key in rawClips) {
        const rawClip = rawClips[key];
        const clip = this.addClip(rawClip);
        animationClips.push(clip);
      }
    }

    return animationClips;
  }

  parseClips() {
    // since the actual transformation data is stored in FBXTree.Objects.AnimationCurve,
    // if this is undefined we can safely assume there are no animations
    if (fbxTree.Objects.AnimationCurve === undefined) return undefined;
    const curveNodesMap = this.parseAnimationCurveNodes();
    this.parseAnimationCurves(curveNodesMap);
    const layersMap = this.parseAnimationLayers(curveNodesMap);
    const rawClips = this.parseAnimStacks(layersMap);
    return rawClips;
  } // parse nodes in FBXTree.Objects.AnimationCurveNode
  // each AnimationCurveNode holds data for an animation transform for a model (e.g. left arm rotation )
  // and is referenced by an AnimationLayer


  parseAnimationCurveNodes() {
    const rawCurveNodes = fbxTree.Objects.AnimationCurveNode;
    const curveNodesMap = new Map();

    for (const nodeID in rawCurveNodes) {
      const rawCurveNode = rawCurveNodes[nodeID];

      if (rawCurveNode.attrName.match(/S|R|T|DeformPercent/) !== null) {
        const curveNode = {
          id: rawCurveNode.id,
          attr: rawCurveNode.attrName,
          curves: {}
        };
        curveNodesMap.set(curveNode.id, curveNode);
      }
    }

    return curveNodesMap;
  } // parse nodes in FBXTree.Objects.AnimationCurve and connect them up to
  // previously parsed AnimationCurveNodes. Each AnimationCurve holds data for a single animated
  // axis ( e.g. times and values of x rotation)


  parseAnimationCurves(curveNodesMap) {
    const rawCurves = fbxTree.Objects.AnimationCurve; // TODO: Many values are identical up to roundoff error, but won't be optimised
    // e.g. position times: [0, 0.4, 0. 8]
    // position values: [7.23538335023477e-7, 93.67518615722656, -0.9982695579528809, 7.23538335023477e-7, 93.67518615722656, -0.9982695579528809, 7.235384487103147e-7, 93.67520904541016, -0.9982695579528809]
    // clearly, this should be optimised to
    // times: [0], positions [7.23538335023477e-7, 93.67518615722656, -0.9982695579528809]
    // this shows up in nearly every FBX file, and generally time array is length > 100

    for (const nodeID in rawCurves) {
      const animationCurve = {
        id: rawCurves[nodeID].id,
        times: rawCurves[nodeID].KeyTime.a.map(convertFBXTimeToSeconds),
        values: rawCurves[nodeID].KeyValueFloat.a
      };
      const relationships = connections.get(animationCurve.id);

      if (relationships !== undefined) {
        const animationCurveID = relationships.parents[0].ID;
        const animationCurveRelationship = relationships.parents[0].relationship;

        if (animationCurveRelationship.match(/X/)) {
          curveNodesMap.get(animationCurveID).curves['x'] = animationCurve;
        } else if (animationCurveRelationship.match(/Y/)) {
          curveNodesMap.get(animationCurveID).curves['y'] = animationCurve;
        } else if (animationCurveRelationship.match(/Z/)) {
          curveNodesMap.get(animationCurveID).curves['z'] = animationCurve;
        } else if (animationCurveRelationship.match(/d|DeformPercent/) && curveNodesMap.has(animationCurveID)) {
          curveNodesMap.get(animationCurveID).curves['morph'] = animationCurve;
        }
      }
    }
  } // parse nodes in FBXTree.Objects.AnimationLayer. Each layers holds references
  // to various AnimationCurveNodes and is referenced by an AnimationStack node
  // note: theoretically a stack can have multiple layers, however in practice there always seems to be one per stack


  parseAnimationLayers(curveNodesMap) {
    const rawLayers = fbxTree.Objects.AnimationLayer;
    const layersMap = new Map();

    for (const nodeID in rawLayers) {
      const layerCurveNodes = [];
      const connection = connections.get(parseInt(nodeID));

      if (connection !== undefined) {
        // all the animationCurveNodes used in the layer
        const children = connection.children;
        children.forEach(function (child, i) {
          if (curveNodesMap.has(child.ID)) {
            const curveNode = curveNodesMap.get(child.ID); // check that the curves are defined for at least one axis, otherwise ignore the curveNode

            if (curveNode.curves.x !== undefined || curveNode.curves.y !== undefined || curveNode.curves.z !== undefined) {
              if (layerCurveNodes[i] === undefined) {
                const modelID = connections.get(child.ID).parents.filter(function (parent) {
                  return parent.relationship !== undefined;
                })[0].ID;

                if (modelID !== undefined) {
                  const rawModel = fbxTree.Objects.Model[modelID.toString()];

                  if (rawModel === undefined) {
                    console.warn('THREE.FBXLoader: Encountered a unused curve.', child);
                    return;
                  }

                  const node = {
                    modelName: rawModel.attrName ? THREE.PropertyBinding.sanitizeNodeName(rawModel.attrName) : '',
                    ID: rawModel.id,
                    initialPosition: [0, 0, 0],
                    initialRotation: [0, 0, 0],
                    initialScale: [1, 1, 1]
                  };
                  sceneGraph.traverse(function (child) {
                    if (child.ID === rawModel.id) {
                      node.transform = child.matrix;
                      if (child.userData.transformData) node.eulerOrder = child.userData.transformData.eulerOrder;
                    }
                  });
                  if (!node.transform) node.transform = new THREE.Matrix4(); // if the animated model is pre rotated, we'll have to apply the pre rotations to every
                  // animation value as well

                  if ('PreRotation' in rawModel) node.preRotation = rawModel.PreRotation.value;
                  if ('PostRotation' in rawModel) node.postRotation = rawModel.PostRotation.value;
                  layerCurveNodes[i] = node;
                }
              }

              if (layerCurveNodes[i]) layerCurveNodes[i][curveNode.attr] = curveNode;
            } else if (curveNode.curves.morph !== undefined) {
              if (layerCurveNodes[i] === undefined) {
                const deformerID = connections.get(child.ID).parents.filter(function (parent) {
                  return parent.relationship !== undefined;
                })[0].ID;
                const morpherID = connections.get(deformerID).parents[0].ID;
                const geoID = connections.get(morpherID).parents[0].ID; // assuming geometry is not used in more than one model

                const modelID = connections.get(geoID).parents[0].ID;
                const rawModel = fbxTree.Objects.Model[modelID];
                const node = {
                  modelName: rawModel.attrName ? THREE.PropertyBinding.sanitizeNodeName(rawModel.attrName) : '',
                  morphName: fbxTree.Objects.Deformer[deformerID].attrName
                };
                layerCurveNodes[i] = node;
              }

              layerCurveNodes[i][curveNode.attr] = curveNode;
            }
          }
        });
        layersMap.set(parseInt(nodeID), layerCurveNodes);
      }
    }

    return layersMap;
  } // parse nodes in FBXTree.Objects.AnimationStack. These are the top level node in the animation
  // hierarchy. Each Stack node will be used to create a THREE.AnimationClip


  parseAnimStacks(layersMap) {
    const rawStacks = fbxTree.Objects.AnimationStack; // connect the stacks (clips) up to the layers

    const rawClips = {};

    for (const nodeID in rawStacks) {
      const children = connections.get(parseInt(nodeID)).children;

      if (children.length > 1) {
        // it seems like stacks will always be associated with a single layer. But just in case there are files
        // where there are multiple layers per stack, we'll display a warning
        console.warn('THREE.FBXLoader: Encountered an animation stack with multiple layers, this is currently not supported. Ignoring subsequent layers.');
      }

      const layer = layersMap.get(children[0].ID);
      rawClips[nodeID] = {
        name: rawStacks[nodeID].attrName,
        layer: layer
      };
    }

    return rawClips;
  }

  addClip(rawClip) {
    let tracks = [];
    const scope = this;
    rawClip.layer.forEach(function (rawTracks) {
      tracks = tracks.concat(scope.generateTracks(rawTracks));
    });
    return new THREE.AnimationClip(rawClip.name, -1, tracks);
  }

  generateTracks(rawTracks) {
    const tracks = [];
    let initialPosition = new THREE.Vector3();
    let initialRotation = new THREE.Quaternion();
    let initialScale = new THREE.Vector3();
    if (rawTracks.transform) rawTracks.transform.decompose(initialPosition, initialRotation, initialScale);
    initialPosition = initialPosition.toArray();
    initialRotation = new THREE.Euler().setFromQuaternion(initialRotation, rawTracks.eulerOrder).toArray();
    initialScale = initialScale.toArray();

    if (rawTracks.T !== undefined && Object.keys(rawTracks.T.curves).length > 0) {
      const positionTrack = this.generateVectorTrack(rawTracks.modelName, rawTracks.T.curves, initialPosition, 'position');
      if (positionTrack !== undefined) tracks.push(positionTrack);
    }

    if (rawTracks.R !== undefined && Object.keys(rawTracks.R.curves).length > 0) {
      const rotationTrack = this.generateRotationTrack(rawTracks.modelName, rawTracks.R.curves, initialRotation, rawTracks.preRotation, rawTracks.postRotation, rawTracks.eulerOrder);
      if (rotationTrack !== undefined) tracks.push(rotationTrack);
    }

    if (rawTracks.S !== undefined && Object.keys(rawTracks.S.curves).length > 0) {
      const scaleTrack = this.generateVectorTrack(rawTracks.modelName, rawTracks.S.curves, initialScale, 'scale');
      if (scaleTrack !== undefined) tracks.push(scaleTrack);
    }

    if (rawTracks.DeformPercent !== undefined) {
      const morphTrack = this.generateMorphTrack(rawTracks);
      if (morphTrack !== undefined) tracks.push(morphTrack);
    }

    return tracks;
  }

  generateVectorTrack(modelName, curves, initialValue, type) {
    const times = this.getTimesForAllAxes(curves);
    const values = this.getKeyframeTrackValues(times, curves, initialValue);
    return new THREE.VectorKeyframeTrack(modelName + '.' + type, times, values);
  }

  generateRotationTrack(modelName, curves, initialValue, preRotation, postRotation, eulerOrder) {
    if (curves.x !== undefined) {
      this.interpolateRotations(curves.x);
      curves.x.values = curves.x.values.map(THREE.MathUtils.degToRad);
    }

    if (curves.y !== undefined) {
      this.interpolateRotations(curves.y);
      curves.y.values = curves.y.values.map(THREE.MathUtils.degToRad);
    }

    if (curves.z !== undefined) {
      this.interpolateRotations(curves.z);
      curves.z.values = curves.z.values.map(THREE.MathUtils.degToRad);
    }

    const times = this.getTimesForAllAxes(curves);
    const values = this.getKeyframeTrackValues(times, curves, initialValue);

    if (preRotation !== undefined) {
      preRotation = preRotation.map(THREE.MathUtils.degToRad);
      preRotation.push(eulerOrder);
      preRotation = new THREE.Euler().fromArray(preRotation);
      preRotation = new THREE.Quaternion().setFromEuler(preRotation);
    }

    if (postRotation !== undefined) {
      postRotation = postRotation.map(THREE.MathUtils.degToRad);
      postRotation.push(eulerOrder);
      postRotation = new THREE.Euler().fromArray(postRotation);
      postRotation = new THREE.Quaternion().setFromEuler(postRotation).invert();
    }

    const quaternion = new THREE.Quaternion();
    const euler = new THREE.Euler();
    const quaternionValues = [];

    for (let i = 0; i < values.length; i += 3) {
      euler.set(values[i], values[i + 1], values[i + 2], eulerOrder);
      quaternion.setFromEuler(euler);
      if (preRotation !== undefined) quaternion.premultiply(preRotation);
      if (postRotation !== undefined) quaternion.multiply(postRotation);
      quaternion.toArray(quaternionValues, i / 3 * 4);
    }

    return new THREE.QuaternionKeyframeTrack(modelName + '.quaternion', times, quaternionValues);
  }

  generateMorphTrack(rawTracks) {
    const curves = rawTracks.DeformPercent.curves.morph;
    const values = curves.values.map(function (val) {
      return val / 100;
    });
    const morphNum = sceneGraph.getObjectByName(rawTracks.modelName).morphTargetDictionary[rawTracks.morphName];
    return new THREE.NumberKeyframeTrack(rawTracks.modelName + '.morphTargetInfluences[' + morphNum + ']', curves.times, values);
  } // For all animated objects, times are defined separately for each axis
  // Here we'll combine the times into one sorted array without duplicates


  getTimesForAllAxes(curves) {
    let times = []; // first join together the times for each axis, if defined

    if (curves.x !== undefined) times = times.concat(curves.x.times);
    if (curves.y !== undefined) times = times.concat(curves.y.times);
    if (curves.z !== undefined) times = times.concat(curves.z.times); // then sort them

    times = times.sort(function (a, b) {
      return a - b;
    }); // and remove duplicates

    if (times.length > 1) {
      let targetIndex = 1;
      let lastValue = times[0];

      for (let i = 1; i < times.length; i++) {
        const currentValue = times[i];

        if (currentValue !== lastValue) {
          times[targetIndex] = currentValue;
          lastValue = currentValue;
          targetIndex++;
        }
      }

      times = times.slice(0, targetIndex);
    }

    return times;
  }

  getKeyframeTrackValues(times, curves, initialValue) {
    const prevValue = initialValue;
    const values = [];
    let xIndex = -1;
    let yIndex = -1;
    let zIndex = -1;
    times.forEach(function (time) {
      if (curves.x) xIndex = curves.x.times.indexOf(time);
      if (curves.y) yIndex = curves.y.times.indexOf(time);
      if (curves.z) zIndex = curves.z.times.indexOf(time); // if there is an x value defined for this frame, use that

      if (xIndex !== -1) {
        const xValue = curves.x.values[xIndex];
        values.push(xValue);
        prevValue[0] = xValue;
      } else {
        // otherwise use the x value from the previous frame
        values.push(prevValue[0]);
      }

      if (yIndex !== -1) {
        const yValue = curves.y.values[yIndex];
        values.push(yValue);
        prevValue[1] = yValue;
      } else {
        values.push(prevValue[1]);
      }

      if (zIndex !== -1) {
        const zValue = curves.z.values[zIndex];
        values.push(zValue);
        prevValue[2] = zValue;
      } else {
        values.push(prevValue[2]);
      }
    });
    return values;
  } // Rotations are defined as THREE.Euler angles which can have values  of any size
  // These will be converted to quaternions which don't support values greater than
  // PI, so we'll interpolate large rotations


  interpolateRotations(curve) {
    for (let i = 1; i < curve.values.length; i++) {
      const initialValue = curve.values[i - 1];
      const valuesSpan = curve.values[i] - initialValue;
      const absoluteSpan = Math.abs(valuesSpan);

      if (absoluteSpan >= 180) {
        const numSubIntervals = absoluteSpan / 180;
        const step = valuesSpan / numSubIntervals;
        let nextValue = initialValue + step;
        const initialTime = curve.times[i - 1];
        const timeSpan = curve.times[i] - initialTime;
        const interval = timeSpan / numSubIntervals;
        let nextTime = initialTime + interval;
        const interpolatedTimes = [];
        const interpolatedValues = [];

        while (nextTime < curve.times[i]) {
          interpolatedTimes.push(nextTime);
          nextTime += interval;
          interpolatedValues.push(nextValue);
          nextValue += step;
        }

        curve.times = inject(curve.times, i, interpolatedTimes);
        curve.values = inject(curve.values, i, interpolatedValues);
      }
    }
  }

} // parse an FBX file in ASCII format


class TextParser {
  getPrevNode() {
    return this.nodeStack[this.currentIndent - 2];
  }

  getCurrentNode() {
    return this.nodeStack[this.currentIndent - 1];
  }

  getCurrentProp() {
    return this.currentProp;
  }

  pushStack(node) {
    this.nodeStack.push(node);
    this.currentIndent += 1;
  }

  popStack() {
    this.nodeStack.pop();
    this.currentIndent -= 1;
  }

  setCurrentProp(val, name) {
    this.currentProp = val;
    this.currentPropName = name;
  }

  parse(text) {
    this.currentIndent = 0;
    this.allNodes = new FBXTree();
    this.nodeStack = [];
    this.currentProp = [];
    this.currentPropName = '';
    const scope = this;
    const split = text.split(/[\r\n]+/);
    split.forEach(function (line, i) {
      const matchComment = line.match(/^[\s\t]*;/);
      const matchEmpty = line.match(/^[\s\t]*$/);
      if (matchComment || matchEmpty) return;
      const matchBeginning = line.match('^\\t{' + scope.currentIndent + '}(\\w+):(.*){', '');
      const matchProperty = line.match('^\\t{' + scope.currentIndent + '}(\\w+):[\\s\\t\\r\\n](.*)');
      const matchEnd = line.match('^\\t{' + (scope.currentIndent - 1) + '}}');

      if (matchBeginning) {
        scope.parseNodeBegin(line, matchBeginning);
      } else if (matchProperty) {
        scope.parseNodeProperty(line, matchProperty, split[++i]);
      } else if (matchEnd) {
        scope.popStack();
      } else if (line.match(/^[^\s\t}]/)) {
        // large arrays are split over multiple lines terminated with a ',' character
        // if this is encountered the line needs to be joined to the previous line
        scope.parseNodePropertyContinued(line);
      }
    });
    return this.allNodes;
  }

  parseNodeBegin(line, property) {
    const nodeName = property[1].trim().replace(/^"/, '').replace(/"$/, '');
    const nodeAttrs = property[2].split(',').map(function (attr) {
      return attr.trim().replace(/^"/, '').replace(/"$/, '');
    });
    const node = {
      name: nodeName
    };
    const attrs = this.parseNodeAttr(nodeAttrs);
    const currentNode = this.getCurrentNode(); // a top node

    if (this.currentIndent === 0) {
      this.allNodes.add(nodeName, node);
    } else {
      // a subnode
      // if the subnode already exists, append it
      if (nodeName in currentNode) {
        // special case Pose needs PoseNodes as an array
        if (nodeName === 'PoseNode') {
          currentNode.PoseNode.push(node);
        } else if (currentNode[nodeName].id !== undefined) {
          currentNode[nodeName] = {};
          currentNode[nodeName][currentNode[nodeName].id] = currentNode[nodeName];
        }

        if (attrs.id !== '') currentNode[nodeName][attrs.id] = node;
      } else if (typeof attrs.id === 'number') {
        currentNode[nodeName] = {};
        currentNode[nodeName][attrs.id] = node;
      } else if (nodeName !== 'Properties70') {
        if (nodeName === 'PoseNode') currentNode[nodeName] = [node];else currentNode[nodeName] = node;
      }
    }

    if (typeof attrs.id === 'number') node.id = attrs.id;
    if (attrs.name !== '') node.attrName = attrs.name;
    if (attrs.type !== '') node.attrType = attrs.type;
    this.pushStack(node);
  }

  parseNodeAttr(attrs) {
    let id = attrs[0];

    if (attrs[0] !== '') {
      id = parseInt(attrs[0]);

      if (isNaN(id)) {
        id = attrs[0];
      }
    }

    let name = '',
        type = '';

    if (attrs.length > 1) {
      name = attrs[1].replace(/^(\w+)::/, '');
      type = attrs[2];
    }

    return {
      id: id,
      name: name,
      type: type
    };
  }

  parseNodeProperty(line, property, contentLine) {
    let propName = property[1].replace(/^"/, '').replace(/"$/, '').trim();
    let propValue = property[2].replace(/^"/, '').replace(/"$/, '').trim(); // for special case: base64 image data follows "Content: ," line
    //	Content: ,
    //	 "/9j/4RDaRXhpZgAATU0A..."

    if (propName === 'Content' && propValue === ',') {
      propValue = contentLine.replace(/"/g, '').replace(/,$/, '').trim();
    }

    const currentNode = this.getCurrentNode();
    const parentName = currentNode.name;

    if (parentName === 'Properties70') {
      this.parseNodeSpecialProperty(line, propName, propValue);
      return;
    } // Connections


    if (propName === 'C') {
      const connProps = propValue.split(',').slice(1);
      const from = parseInt(connProps[0]);
      const to = parseInt(connProps[1]);
      let rest = propValue.split(',').slice(3);
      rest = rest.map(function (elem) {
        return elem.trim().replace(/^"/, '');
      });
      propName = 'connections';
      propValue = [from, to];
      append(propValue, rest);

      if (currentNode[propName] === undefined) {
        currentNode[propName] = [];
      }
    } // Node


    if (propName === 'Node') currentNode.id = propValue; // connections

    if (propName in currentNode && Array.isArray(currentNode[propName])) {
      currentNode[propName].push(propValue);
    } else {
      if (propName !== 'a') currentNode[propName] = propValue;else currentNode.a = propValue;
    }

    this.setCurrentProp(currentNode, propName); // convert string to array, unless it ends in ',' in which case more will be added to it

    if (propName === 'a' && propValue.slice(-1) !== ',') {
      currentNode.a = parseNumberArray(propValue);
    }
  }

  parseNodePropertyContinued(line) {
    const currentNode = this.getCurrentNode();
    currentNode.a += line; // if the line doesn't end in ',' we have reached the end of the property value
    // so convert the string to an array

    if (line.slice(-1) !== ',') {
      currentNode.a = parseNumberArray(currentNode.a);
    }
  } // parse "Property70"


  parseNodeSpecialProperty(line, propName, propValue) {
    // split this
    // P: "Lcl Scaling", "Lcl Scaling", "", "A",1,1,1
    // into array like below
    // ["Lcl Scaling", "Lcl Scaling", "", "A", "1,1,1" ]
    const props = propValue.split('",').map(function (prop) {
      return prop.trim().replace(/^\"/, '').replace(/\s/, '_');
    });
    const innerPropName = props[0];
    const innerPropType1 = props[1];
    const innerPropType2 = props[2];
    const innerPropFlag = props[3];
    let innerPropValue = props[4]; // cast values where needed, otherwise leave as strings

    switch (innerPropType1) {
      case 'int':
      case 'enum':
      case 'bool':
      case 'ULongLong':
      case 'double':
      case 'Number':
      case 'FieldOfView':
        innerPropValue = parseFloat(innerPropValue);
        break;

      case 'Color':
      case 'ColorRGB':
      case 'Vector3D':
      case 'Lcl_Translation':
      case 'Lcl_Rotation':
      case 'Lcl_Scaling':
        innerPropValue = parseNumberArray(innerPropValue);
        break;
    } // CAUTION: these props must append to parent's parent


    this.getPrevNode()[innerPropName] = {
      'type': innerPropType1,
      'type2': innerPropType2,
      'flag': innerPropFlag,
      'value': innerPropValue
    };
    this.setCurrentProp(this.getPrevNode(), innerPropName);
  }

} // Parse an FBX file in Binary format


class BinaryParser {
  parse(buffer) {
    const reader = new BinaryReader(buffer);
    reader.skip(23); // skip magic 23 bytes

    const version = reader.getUint32();

    if (version < 6400) {
      throw new Error('THREE.FBXLoader: FBX version not supported, FileVersion: ' + version);
    }

    const allNodes = new FBXTree();

    while (!this.endOfContent(reader)) {
      const node = this.parseNode(reader, version);
      if (node !== null) allNodes.add(node.name, node);
    }

    return allNodes;
  } // Check if reader has reached the end of content.


  endOfContent(reader) {
    // footer size: 160bytes + 16-byte alignment padding
    // - 16bytes: magic
    // - padding til 16-byte alignment (at least 1byte?)
    //	(seems like some exporters embed fixed 15 or 16bytes?)
    // - 4bytes: magic
    // - 4bytes: version
    // - 120bytes: zero
    // - 16bytes: magic
    if (reader.size() % 16 === 0) {
      return (reader.getOffset() + 160 + 16 & ~0xf) >= reader.size();
    } else {
      return reader.getOffset() + 160 + 16 >= reader.size();
    }
  } // recursively parse nodes until the end of the file is reached


  parseNode(reader, version) {
    const node = {}; // The first three data sizes depends on version.

    const endOffset = version >= 7500 ? reader.getUint64() : reader.getUint32();
    const numProperties = version >= 7500 ? reader.getUint64() : reader.getUint32();
    version >= 7500 ? reader.getUint64() : reader.getUint32(); // the returned propertyListLen is not used

    const nameLen = reader.getUint8();
    const name = reader.getString(nameLen); // Regards this node as NULL-record if endOffset is zero

    if (endOffset === 0) return null;
    const propertyList = [];

    for (let i = 0; i < numProperties; i++) {
      propertyList.push(this.parseProperty(reader));
    } // Regards the first three elements in propertyList as id, attrName, and attrType


    const id = propertyList.length > 0 ? propertyList[0] : '';
    const attrName = propertyList.length > 1 ? propertyList[1] : '';
    const attrType = propertyList.length > 2 ? propertyList[2] : ''; // check if this node represents just a single property
    // like (name, 0) set or (name2, [0, 1, 2]) set of {name: 0, name2: [0, 1, 2]}

    node.singleProperty = numProperties === 1 && reader.getOffset() === endOffset ? true : false;

    while (endOffset > reader.getOffset()) {
      const subNode = this.parseNode(reader, version);
      if (subNode !== null) this.parseSubNode(name, node, subNode);
    }

    node.propertyList = propertyList; // raw property list used by parent

    if (typeof id === 'number') node.id = id;
    if (attrName !== '') node.attrName = attrName;
    if (attrType !== '') node.attrType = attrType;
    if (name !== '') node.name = name;
    return node;
  }

  parseSubNode(name, node, subNode) {
    // special case: child node is single property
    if (subNode.singleProperty === true) {
      const value = subNode.propertyList[0];

      if (Array.isArray(value)) {
        node[subNode.name] = subNode;
        subNode.a = value;
      } else {
        node[subNode.name] = value;
      }
    } else if (name === 'Connections' && subNode.name === 'C') {
      const array = [];
      subNode.propertyList.forEach(function (property, i) {
        // first Connection is FBX type (OO, OP, etc.). We'll discard these
        if (i !== 0) array.push(property);
      });

      if (node.connections === undefined) {
        node.connections = [];
      }

      node.connections.push(array);
    } else if (subNode.name === 'Properties70') {
      const keys = Object.keys(subNode);
      keys.forEach(function (key) {
        node[key] = subNode[key];
      });
    } else if (name === 'Properties70' && subNode.name === 'P') {
      let innerPropName = subNode.propertyList[0];
      let innerPropType1 = subNode.propertyList[1];
      const innerPropType2 = subNode.propertyList[2];
      const innerPropFlag = subNode.propertyList[3];
      let innerPropValue;
      if (innerPropName.indexOf('Lcl ') === 0) innerPropName = innerPropName.replace('Lcl ', 'Lcl_');
      if (innerPropType1.indexOf('Lcl ') === 0) innerPropType1 = innerPropType1.replace('Lcl ', 'Lcl_');

      if (innerPropType1 === 'Color' || innerPropType1 === 'ColorRGB' || innerPropType1 === 'Vector' || innerPropType1 === 'Vector3D' || innerPropType1.indexOf('Lcl_') === 0) {
        innerPropValue = [subNode.propertyList[4], subNode.propertyList[5], subNode.propertyList[6]];
      } else {
        innerPropValue = subNode.propertyList[4];
      } // this will be copied to parent, see above


      node[innerPropName] = {
        'type': innerPropType1,
        'type2': innerPropType2,
        'flag': innerPropFlag,
        'value': innerPropValue
      };
    } else if (node[subNode.name] === undefined) {
      if (typeof subNode.id === 'number') {
        node[subNode.name] = {};
        node[subNode.name][subNode.id] = subNode;
      } else {
        node[subNode.name] = subNode;
      }
    } else {
      if (subNode.name === 'PoseNode') {
        if (!Array.isArray(node[subNode.name])) {
          node[subNode.name] = [node[subNode.name]];
        }

        node[subNode.name].push(subNode);
      } else if (node[subNode.name][subNode.id] === undefined) {
        node[subNode.name][subNode.id] = subNode;
      }
    }
  }

  parseProperty(reader) {
    const type = reader.getString(1);
    let length;

    switch (type) {
      case 'C':
        return reader.getBoolean();

      case 'D':
        return reader.getFloat64();

      case 'F':
        return reader.getFloat32();

      case 'I':
        return reader.getInt32();

      case 'L':
        return reader.getInt64();

      case 'R':
        length = reader.getUint32();
        return reader.getArrayBuffer(length);

      case 'S':
        length = reader.getUint32();
        return reader.getString(length);

      case 'Y':
        return reader.getInt16();

      case 'b':
      case 'c':
      case 'd':
      case 'f':
      case 'i':
      case 'l':
        const arrayLength = reader.getUint32();
        const encoding = reader.getUint32(); // 0: non-compressed, 1: compressed

        const compressedLength = reader.getUint32();

        if (encoding === 0) {
          switch (type) {
            case 'b':
            case 'c':
              return reader.getBooleanArray(arrayLength);

            case 'd':
              return reader.getFloat64Array(arrayLength);

            case 'f':
              return reader.getFloat32Array(arrayLength);

            case 'i':
              return reader.getInt32Array(arrayLength);

            case 'l':
              return reader.getInt64Array(arrayLength);
          }
        }

        if (typeof fflate === 'undefined') {
          console.error('THREE.FBXLoader: External library fflate.min.js required.');
        }

        const data = fflate.unzlibSync(new Uint8Array(reader.getArrayBuffer(compressedLength))); // eslint-disable-line no-undef

        const reader2 = new BinaryReader(data.buffer);

        switch (type) {
          case 'b':
          case 'c':
            return reader2.getBooleanArray(arrayLength);

          case 'd':
            return reader2.getFloat64Array(arrayLength);

          case 'f':
            return reader2.getFloat32Array(arrayLength);

          case 'i':
            return reader2.getInt32Array(arrayLength);

          case 'l':
            return reader2.getInt64Array(arrayLength);
        }

      default:
        throw new Error('THREE.FBXLoader: Unknown property type ' + type);
    }
  }

}

class BinaryReader {
  constructor(buffer, littleEndian) {
    this.dv = new DataView(buffer);
    this.offset = 0;
    this.littleEndian = littleEndian !== undefined ? littleEndian : true;
  }

  getOffset() {
    return this.offset;
  }

  size() {
    return this.dv.buffer.byteLength;
  }

  skip(length) {
    this.offset += length;
  } // seems like true/false representation depends on exporter.
  // true: 1 or 'Y'(=0x59), false: 0 or 'T'(=0x54)
  // then sees LSB.


  getBoolean() {
    return (this.getUint8() & 1) === 1;
  }

  getBooleanArray(size) {
    const a = [];

    for (let i = 0; i < size; i++) {
      a.push(this.getBoolean());
    }

    return a;
  }

  getUint8() {
    const value = this.dv.getUint8(this.offset);
    this.offset += 1;
    return value;
  }

  getInt16() {
    const value = this.dv.getInt16(this.offset, this.littleEndian);
    this.offset += 2;
    return value;
  }

  getInt32() {
    const value = this.dv.getInt32(this.offset, this.littleEndian);
    this.offset += 4;
    return value;
  }

  getInt32Array(size) {
    const a = [];

    for (let i = 0; i < size; i++) {
      a.push(this.getInt32());
    }

    return a;
  }

  getUint32() {
    const value = this.dv.getUint32(this.offset, this.littleEndian);
    this.offset += 4;
    return value;
  } // JavaScript doesn't support 64-bit integer so calculate this here
  // 1 << 32 will return 1 so using multiply operation instead here.
  // There's a possibility that this method returns wrong value if the value
  // is out of the range between Number.MAX_SAFE_INTEGER and Number.MIN_SAFE_INTEGER.
  // TODO: safely handle 64-bit integer


  getInt64() {
    let low, high;

    if (this.littleEndian) {
      low = this.getUint32();
      high = this.getUint32();
    } else {
      high = this.getUint32();
      low = this.getUint32();
    } // calculate negative value


    if (high & 0x80000000) {
      high = ~high & 0xFFFFFFFF;
      low = ~low & 0xFFFFFFFF;
      if (low === 0xFFFFFFFF) high = high + 1 & 0xFFFFFFFF;
      low = low + 1 & 0xFFFFFFFF;
      return -(high * 0x100000000 + low);
    }

    return high * 0x100000000 + low;
  }

  getInt64Array(size) {
    const a = [];

    for (let i = 0; i < size; i++) {
      a.push(this.getInt64());
    }

    return a;
  } // Note: see getInt64() comment


  getUint64() {
    let low, high;

    if (this.littleEndian) {
      low = this.getUint32();
      high = this.getUint32();
    } else {
      high = this.getUint32();
      low = this.getUint32();
    }

    return high * 0x100000000 + low;
  }

  getFloat32() {
    const value = this.dv.getFloat32(this.offset, this.littleEndian);
    this.offset += 4;
    return value;
  }

  getFloat32Array(size) {
    const a = [];

    for (let i = 0; i < size; i++) {
      a.push(this.getFloat32());
    }

    return a;
  }

  getFloat64() {
    const value = this.dv.getFloat64(this.offset, this.littleEndian);
    this.offset += 8;
    return value;
  }

  getFloat64Array(size) {
    const a = [];

    for (let i = 0; i < size; i++) {
      a.push(this.getFloat64());
    }

    return a;
  }

  getArrayBuffer(size) {
    const value = this.dv.buffer.slice(this.offset, this.offset + size);
    this.offset += size;
    return value;
  }

  getString(size) {
    // note: safari 9 doesn't support Uint8Array.indexOf; create intermediate array instead
    let a = [];

    for (let i = 0; i < size; i++) {
      a[i] = this.getUint8();
    }

    const nullByte = a.indexOf(0);
    if (nullByte >= 0) a = a.slice(0, nullByte);
    return THREE.LoaderUtils.decodeText(new Uint8Array(a));
  }

} // FBXTree holds a representation of the FBX data, returned by the TextParser ( FBX ASCII format)
// and BinaryParser( FBX Binary format)


class FBXTree {
  add(key, val) {
    this[key] = val;
  }

} // ************** UTILITY FUNCTIONS **************


function isFbxFormatBinary(buffer) {
  const CORRECT = 'Kaydara\u0020FBX\u0020Binary\u0020\u0020\0';
  return buffer.byteLength >= CORRECT.length && CORRECT === convertArrayBufferToString(buffer, 0, CORRECT.length);
}

function isFbxFormatASCII(text) {
  const CORRECT = ['K', 'a', 'y', 'd', 'a', 'r', 'a', '\\', 'F', 'B', 'X', '\\', 'B', 'i', 'n', 'a', 'r', 'y', '\\', '\\'];
  let cursor = 0;

  function read(offset) {
    const result = text[offset - 1];
    text = text.slice(cursor + offset);
    cursor++;
    return result;
  }

  for (let i = 0; i < CORRECT.length; ++i) {
    const num = read(1);

    if (num === CORRECT[i]) {
      return false;
    }
  }

  return true;
}

function getFbxVersion(text) {
  const versionRegExp = /FBXVersion: (\d+)/;
  const match = text.match(versionRegExp);

  if (match) {
    const version = parseInt(match[1]);
    return version;
  }

  throw new Error('THREE.FBXLoader: Cannot find the version number for the file given.');
} // Converts FBX ticks into real time seconds.


function convertFBXTimeToSeconds(time) {
  return time / 46186158000;
}

const dataArray = []; // extracts the data from the correct position in the FBX array based on indexing type

function getData(polygonVertexIndex, polygonIndex, vertexIndex, infoObject) {
  let index;

  switch (infoObject.mappingType) {
    case 'ByPolygonVertex':
      index = polygonVertexIndex;
      break;

    case 'ByPolygon':
      index = polygonIndex;
      break;

    case 'ByVertice':
      index = vertexIndex;
      break;

    case 'AllSame':
      index = infoObject.indices[0];
      break;

    default:
      console.warn('THREE.FBXLoader: unknown attribute mapping type ' + infoObject.mappingType);
  }

  if (infoObject.referenceType === 'IndexToDirect') index = infoObject.indices[index];
  const from = index * infoObject.dataSize;
  const to = from + infoObject.dataSize;
  return slice(dataArray, infoObject.buffer, from, to);
}

const tempEuler = new THREE.Euler();
const tempVec = new THREE.Vector3(); // generate transformation from FBX transform data
// ref: https://help.autodesk.com/view/FBX/2017/ENU/?guid=__files_GUID_10CDD63C_79C1_4F2D_BB28_AD2BE65A02ED_htm
// ref: http://docs.autodesk.com/FBX/2014/ENU/FBX-SDK-Documentation/index.html?url=cpp_ref/_transformations_2main_8cxx-example.html,topicNumber=cpp_ref__transformations_2main_8cxx_example_htmlfc10a1e1-b18d-4e72-9dc0-70d0f1959f5e

function generateTransform(transformData) {
  const lTranslationM = new THREE.Matrix4();
  const lPreRotationM = new THREE.Matrix4();
  const lRotationM = new THREE.Matrix4();
  const lPostRotationM = new THREE.Matrix4();
  const lScalingM = new THREE.Matrix4();
  const lScalingPivotM = new THREE.Matrix4();
  const lScalingOffsetM = new THREE.Matrix4();
  const lRotationOffsetM = new THREE.Matrix4();
  const lRotationPivotM = new THREE.Matrix4();
  const lParentGX = new THREE.Matrix4();
  const lParentLX = new THREE.Matrix4();
  const lGlobalT = new THREE.Matrix4();
  const inheritType = transformData.inheritType ? transformData.inheritType : 0;
  if (transformData.translation) lTranslationM.setPosition(tempVec.fromArray(transformData.translation));

  if (transformData.preRotation) {
    const array = transformData.preRotation.map(THREE.MathUtils.degToRad);
    array.push(transformData.eulerOrder);
    lPreRotationM.makeRotationFromEuler(tempEuler.fromArray(array));
  }

  if (transformData.rotation) {
    const array = transformData.rotation.map(THREE.MathUtils.degToRad);
    array.push(transformData.eulerOrder);
    lRotationM.makeRotationFromEuler(tempEuler.fromArray(array));
  }

  if (transformData.postRotation) {
    const array = transformData.postRotation.map(THREE.MathUtils.degToRad);
    array.push(transformData.eulerOrder);
    lPostRotationM.makeRotationFromEuler(tempEuler.fromArray(array));
    lPostRotationM.invert();
  }

  if (transformData.scale) lScalingM.scale(tempVec.fromArray(transformData.scale)); // Pivots and offsets

  if (transformData.scalingOffset) lScalingOffsetM.setPosition(tempVec.fromArray(transformData.scalingOffset));
  if (transformData.scalingPivot) lScalingPivotM.setPosition(tempVec.fromArray(transformData.scalingPivot));
  if (transformData.rotationOffset) lRotationOffsetM.setPosition(tempVec.fromArray(transformData.rotationOffset));
  if (transformData.rotationPivot) lRotationPivotM.setPosition(tempVec.fromArray(transformData.rotationPivot)); // parent transform

  if (transformData.parentMatrixWorld) {
    lParentLX.copy(transformData.parentMatrix);
    lParentGX.copy(transformData.parentMatrixWorld);
  }

  const lLRM = new THREE.Matrix4().copy(lPreRotationM).multiply(lRotationM).multiply(lPostRotationM); // Global Rotation

  const lParentGRM = new THREE.Matrix4();
  lParentGRM.extractRotation(lParentGX); // Global Shear*Scaling

  const lParentTM = new THREE.Matrix4();
  lParentTM.copyPosition(lParentGX);
  const lParentGSM = new THREE.Matrix4();
  const lParentGRSM = new THREE.Matrix4().copy(lParentTM).invert().multiply(lParentGX);
  lParentGSM.copy(lParentGRM).invert().multiply(lParentGRSM);
  const lLSM = lScalingM;
  const lGlobalRS = new THREE.Matrix4();

  if (inheritType === 0) {
    lGlobalRS.copy(lParentGRM).multiply(lLRM).multiply(lParentGSM).multiply(lLSM);
  } else if (inheritType === 1) {
    lGlobalRS.copy(lParentGRM).multiply(lParentGSM).multiply(lLRM).multiply(lLSM);
  } else {
    const lParentLSM = new THREE.Matrix4().scale(new THREE.Vector3().setFromMatrixScale(lParentLX));
    const lParentLSM_inv = new THREE.Matrix4().copy(lParentLSM).invert();
    const lParentGSM_noLocal = new THREE.Matrix4().copy(lParentGSM).multiply(lParentLSM_inv);
    lGlobalRS.copy(lParentGRM).multiply(lLRM).multiply(lParentGSM_noLocal).multiply(lLSM);
  }

  const lRotationPivotM_inv = new THREE.Matrix4();
  lRotationPivotM_inv.copy(lRotationPivotM).invert();
  const lScalingPivotM_inv = new THREE.Matrix4();
  lScalingPivotM_inv.copy(lScalingPivotM).invert(); // Calculate the local transform matrix

  let lTransform = new THREE.Matrix4();
  lTransform.copy(lTranslationM).multiply(lRotationOffsetM).multiply(lRotationPivotM).multiply(lPreRotationM).multiply(lRotationM).multiply(lPostRotationM).multiply(lRotationPivotM_inv).multiply(lScalingOffsetM).multiply(lScalingPivotM).multiply(lScalingM).multiply(lScalingPivotM_inv);
  const lLocalTWithAllPivotAndOffsetInfo = new THREE.Matrix4().copyPosition(lTransform);
  const lGlobalTranslation = new THREE.Matrix4().copy(lParentGX).multiply(lLocalTWithAllPivotAndOffsetInfo);
  lGlobalT.copyPosition(lGlobalTranslation);
  lTransform = new THREE.Matrix4().copy(lGlobalT).multiply(lGlobalRS); // from global to local

  lTransform.premultiply(lParentGX.invert());
  return lTransform;
} // Returns the three.js intrinsic THREE.Euler order corresponding to FBX extrinsic THREE.Euler order
// ref: http://help.autodesk.com/view/FBX/2017/ENU/?guid=__cpp_ref_class_fbx_euler_html


function getEulerOrder(order) {
  order = order || 0;
  const enums = ['ZYX', // -> XYZ extrinsic
  'YZX', // -> XZY extrinsic
  'XZY', // -> YZX extrinsic
  'ZXY', // -> YXZ extrinsic
  'YXZ', // -> ZXY extrinsic
  'XYZ' // -> ZYX extrinsic
  //'SphericXYZ', // not possible to support
  ];

  if (order === 6) {
    console.warn('THREE.FBXLoader: unsupported THREE.Euler Order: Spherical XYZ. Animations and rotations may be incorrect.');
    return enums[0];
  }

  return enums[order];
} // Parses comma separated list of numbers and returns them an array.
// Used internally by the TextParser


function parseNumberArray(value) {
  const array = value.split(',').map(function (val) {
    return parseFloat(val);
  });
  return array;
}

function convertArrayBufferToString(buffer, from, to) {
  if (from === undefined) from = 0;
  if (to === undefined) to = buffer.byteLength;
  return THREE.LoaderUtils.decodeText(new Uint8Array(buffer, from, to));
}

function append(a, b) {
  for (let i = 0, j = a.length, l = b.length; i < l; i++, j++) {
    a[j] = b[i];
  }
}

function slice(a, b, from, to) {
  for (let i = from, j = 0; i < to; i++, j++) {
    a[j] = b[i];
  }

  return a;
} // inject array a2 into array a1 at index


function inject(a1, index, a2) {
  return a1.slice(0, index).concat(a2).concat(a1.slice(index));
}

THREE.FBXLoader = FBXLoader;
} )();
